Component Selected Items is not able to capture through Basic List Selection on left component in market place

I’m using basic list selection on left component from the marketplace, and I’ve given the data source which coming from the API and data is displaying properly.
But when I’m trying to capture the Ids of selected items through Component properties > Selected Component’s property or output value, I’m getting empty array each time, I’m expecting selected options Ids will be there in the list.
Can anyone help me out of this?